FIRST:
public JPEGEncoder(Image image, int quality, OutputStream out) {
MediaTracker tracker = new MediaTracker(this);
tracker.addImage(image, 0);
try {
tracker.waitForID(0);
} catch (InterruptedException e) {
}/* Quality of the image.
* 0 to 100 and from bad image quality, high compression to good
* image quality low compression*/
this.quality = quality;
/* Getting picture information
* It takes the Width, Height and RGB scans of the image. */
info = new JPEGInfo(image);
imageHeight = info.imageHeight;
imageWidth = info.imageWidth;
outStream = new BufferedOutputStream(out);
dct = new JPEGDCT(quality);
huffman = new JPEGConvert(imageWidth,imageHeight);
}SECOND:
public class JPEGCompression {
/* The parameter element compressionQuality is the compression (compressionQuality) from
* 0 to 100. */
public void compress(String inputImage, String outputImage, String compressionQuality) {
FileOutputStream dataOut = null;
int compression = 80;
File outputFile = new File(outputImage);
int i = 1;// Makes sure there are no duplicates
while (outputFile.exists()) {
outputFile = new File(outputImage.substring(0, outputImage.lastIndexOf(".")) + (i++) + ".jpg");
}
File inputFile = new File(inputImage);
if (inputFile.exists()) {
try {
dataOut = new FileOutputStream(outputFile);
} catch(IOException e) {}
try {
compression = Integer.parseInt(compressionQuality);
} catch (NumberFormatException e) {
e.printStackTrace();
}
Image image = Toolkit.getDefaultToolkit().getImage(inputImage);
JPEGEncoder encoder = new JPEGEncoder(image, compression, dataOut);
encoder.compress();
try {
dataOut.close();
} catch(IOException e) {}
} else {
throw new IllegalArgumentException("We couldn't find " + inputImage + ". Is it in another directory?");
}
}
}
At 09:09 AM 3/23/03 +0000, you wrote:
Thanks Micael. Tried the same thing and got the same results. Looks like Catalina/Tomcat is indeed using headless mode but it's not working with my Java (1.4) and operating system (SunOS 5.6). I'm presuming you're using this to create/generate graphics in a servlet ? Do you mind posting sample Java that creates a Toolkit or MediaTracker (and which therefore requires headless mode) ? I can't fathom what's wrong with mine. Mine works fine when running on Win2K and Tomcat, but now dying on Sun. Thanks for the help, Stephen.
Micael <[EMAIL PROTECTED]> wrote: I added the headless flag to catalina.sh as follows:
# ----- Execute The Requested Command -----------------------------------------
echo "Using CATALINA_BASE: $CATALINA_BASE" echo "Using CATALINA_HOME: $CATALINA_HOME" echo "Using CATALINA_TMPDIR: $CATALINA_TMPDIR" echo "Using JAVA_HOME: $JAVA_HOME"
if [ "$1" = "jpda" ] ; then if [ -z "$JPDA_ADDRESS" ]; then JPDA_ADDRESS="8000" fi if [ -z "$JDPA_OPTS" ]; then JPDA_OPTS="-Xdebug -Xrunjdwp:transport=dt_socket,address=$JPDA_ADDRESS,server=y,suspend=n" fi CATALINA_OPTS="$CATALINA_OPTS $JPDA_OPTS" shift fi CATALINA_OPTS="-Djava.awt.headless=true"
This worked fine.
At 08:15 AM 3/23/03 +0000, you wrote:
> > On Thu, 2003-03-20 at 20:36, Micael wrote: > > For me the easiest thing was just to provide the right command line > options > > (java.awt.headless=true) when I started up Tomcat. >May I ask, how you did this ? I've also encountered >JNI_OnLoad errors runing on Solaris due, I suspect, the lack of >XWindows on my server. I tried adding the headless flag to >my catalina.sh script as follows ~ >elif [ "$1" = "start" ] ; then > shift > touch "$CATALINA_BASE"/logs/catalina.out > if [ "$1" = "-security" ] ; then > echo "Using Security Manager" > shift > "$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS \ > -Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" \ > -Djava.security.manager \ > -Djava.security.policy=="$CATALINA_BASE"/conf/catalina.policy \ > -Dcatalina.base="$CATALINA_BASE" \ > -Dcatalina.home="$CATALINA_HOME" \ > -Djava.io.tmpdir="$CATALINA_TMPDIR" \ > -Djava.awt.headless=true \ > org.apache.catalina.startup.Bootstrap "$@" start \ > >> "$CATALINA_BASE"/logs/catalina.out 2>&1 & > else > "$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS \ > -Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" \ > -Dcatalina.base="$CATALINA_BASE" \ > -Dcatalina.home="$CATALINA_HOME" \ > -Djava.io.tmpdir="$CATALINA_TMPDIR" \ > -Djava.awt.headless=true \ > org.apache.catalina.startup.Bootstrap "$@" start \ > >> "$CATALINA_BASE"/logs/catalina.out 2>&1 & > fi >But that just resulted in the following error, >java.awt.HeadlessException > at > java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:121) > at java.awt.Window.(Window.java:266) > at java.awt.Frame.(Frame.java:398) > at java.awt.Frame.(Frame.java:363) > at ImageUtils.loadImage(Unknown Source) > >where the loadImage() function is simply supposed to load an image, > public static Image loadImage(String fileName) { > Image image = Toolkit.getDefaultToolkit().getImage(fileName); > MediaTracker mediaTracker = new MediaTracker(new Frame()); > mediaTracker.addImage(image, 0); > try { > mediaTracker.waitForID(0); > } > catch (InterruptedException ie) { > // > } > return image; > } >Any ideas/help would be great. >Stephen. >ps. I also tried PJA but couldn't get that to work either :( > > > > >--------------------------------- >With Yahoo! Mail you can get a bigger mailbox -- choose a size that fits >your needs
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